Permeable Pavement for Road Salt Reduction
Road salt (sodium chloride) is used for de-icing roadways during winter months, but can have a negative impact on the environment. There are already streams and lakes in the Twin Cities metropolitan area that are impaired for chloride, and other metropolitan areas in Minnesota are sure to follow. This research is investigating the reduction in road salt application during winter months that can be attained with permeable pavements, while still providing for acceptable road safety. Some initial investigations have suggested that road salt application can be substantially reduced, even eliminated, with permeable pavement systems. We will investigate this hypothesis more thoroughly, and further document the reduction in road salt application that can be expected with permeable pavement.
John Gulliver, Andrew Erickson, Heinz Stefan, Benjamin Janke, and William Herb